If I recall, WAN is set by the ISP, not by the user. You can either have a static IP that never changes, or a dynamic IP that changes every time your router has to re-establish connection to the ISP.
Thank you

QUOTE(Costello @ Aug 3 2010, 03:41 PM) for some ISPs a new IP address is affected to you every 24 hours or more
so no matter how many times you reconnect, you'll have the same IP
try and wait one more day?

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and thank you.

I'll try tomorrow to see. I would power cycle the modem but that didn't help.

as the above poster said you will either get a static or a dynamic or in some cases a semi dynamic IP, generally the IP has a lease time and when that expires, your router will gain another IP from their pool of IP's I am on ADSL2 and supposed to have a dynamic IP, but even after moving house and the internet being disconnected and reconnected to the new house I still have the same IP, so really if you leave your router off for 24hrs+ you might get a new IP, or in some cases you might still get the same on, it all depends on the ISP and their lease times

A neighbour of mine forces himself to get a new IP (after being locked out of router controls by his parents) by giving himself a DOS attack. It's useful when he needs to bypass controls placed on download sites like megaupload.

how_do_i_do_that, that will only change your computer's IP, not the router's. Also the way many ISPs work it's not abnormal to keep the same IP for weeks or months at a time even if you have a dynamic IP.

OP, you will want to find with the DHCP lease from your ISP is expiring (as said it's usually every 24 hours) and keep the router disconnected at that time so when ti reconnects you're hopefully given a new one. If you disconnect and reconnect within the same DHCP lease period the IP will stay the same, even if you waited 23 hours, you have to pass that specific reset time.

US internet providers do crap differently, they all give you dynamic IP addresses which you can force a change.

You can't get a static IP address unless you want to shell out 500 bucks or more a month.
You've contradicted yourself: first you're saying that you can't get a static IP, now you're saying you can.
All ISPs do things similarly, why pay for a static IP when you can just leave your router on?

Quoted from how_do_i_do_that:

What part of "you have to be plugged directly to the modem" didn't you understand. When your plugged directly to the modem, your ip address is the WAN address.

This is how people on WoW unban themselves from temp bans that are ip related.
ADSL is a dead technology.
It's also the successor to the 'modems' that you're reffering to.
i.e. times have changed

Quoted from juggernaut911:

QUOTE(Rydian @ Aug 5 2010, 02:22 PM)

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Oh, I missed that part.

I can't wait for IPv6 and fully static IPs.

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What benefit will that bring?

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Both are already around.
It'll mean that more people can be on the internet at once, as well as meaning that AAAA records will replace A records.

My hope is that IPv6, when it comes into full swing (as in, fully replacing v4) will allow ISPs to just set static IPs and be done with it since there's no need to shuffle shit around to make up for how little slack there is.

Then maybe people will be on better behavior since you can't just reconnect for an IP change.